Giving a heavy nod to Ridley Scott's oh-so-creepy Alien film series, Alien Breed delivered a good dose of top-down sci-fi arcade adventure back when it first came out for the Amiga. Its portable debut is punctuated with plenty of crawly beast-blasting fun that spans the original game, an updated special edition, and a handful of all-new levels created for its iOS release. While the formula feels a little dated, there's still plenty of pull left in this intense bid for survival amidst the horrors of deep space.